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Weather Newcastle Co Down – Hourly & 7-14 Day Forecast

Arthur William Thompson Cooper • 2026-04-22 • Reviewed by Maya Thompson

Newcastle in County Down sits along the coast of Northern Ireland, where weather patterns can shift quickly between sunshine and showers. For residents and visitors alike, having access to accurate, up-to-date forecasts is essential for planning outdoor activities and daily routines. This report brings together the latest hourly, seven-day, and fourteen-day weather projections from trusted sources including the Met Office, The Weather Network, and AccuWeather to provide a comprehensive overview of current and upcoming conditions.

The town, nestled at the base of Slieve Donard, experiences coastal influences that moderate temperatures throughout the year. Spring months typically bring a mix of sunny intervals and unsettled weather, with temperatures gradually climbing from winter lows. Understanding what to expect in the coming hours and days helps locals make informed decisions about travel, outdoor events, and general preparedness.

Weather in Newcastle County Down Tomorrow

Thursday, April 23 promises a mainly dry day with clear skies overnight and sunny intervals developing through the morning hours. According to the Met Office, temperatures will start around 6-7°C during the early morning before climbing to a afternoon high of 14°C. Overnight lows will settle near 8°C, with clear conditions prevailing through the evening hours.

Current Conditions
Cool overnight temperatures with clear skies
Tomorrow Summary
Sunny intervals, high of 14°C, dry evening
7-Day Highs/Lows
Range from 11°C to 17°C on warmest days
Wind/Precip Trends
Moderate winds 5-11mph, low precipitation risk
  • Clear night conditions expected overnight into Thursday morning
  • Partly sunny afternoon with temperatures reaching 14°C
  • Precipitation risk remains low throughout most of Thursday
  • Moderate winds ranging from 5-11 miles per hour
  • UV levels remain low to moderate during daylight hours
  • Conditions favour dry weather for outdoor activities
  • Evening temperatures dropping to around 8°C
Metric Today (Wed Apr 22) Tomorrow (Thu Apr 23) Trend
High Temp 11°C 14°C Warming
Low Temp 7°C 8°C Slight rise
Wind Moderate 5-11mph Moderate 5-11mph Steady
Conditions Cloudy with sunny breaks Sunny intervals Improving
Precip Chance 40-90% <5% (varies by source) Decreasing

7-Day Weather Forecast for Newcastle Co Down

Temperature and Condition Patterns

The seven-day outlook shows a generally mild but unsettled pattern over the coming week. Daytime highs will range from 11°C to 17°C, with the warmest conditions expected on Friday, April 24. Overnight lows generally stay between 7°C and 12°C, reflecting the moderating influence of the Irish Sea. Cloudy periods with sunny breaks will alternate with shower activity throughout the period.

Wednesday, April 22 brought cloudy conditions with some sunny breaks and light rain during the morning hours. Afternoon and evening showers produced between 1-5 millimetres of rainfall, with precipitation chances ranging from 40-90 percent depending on location. Thursday continues the improving trend with mainly dry conditions, though Friday is expected to bring a more active weather system.

Forecast Discrepancies

Different forecasting services show varying precipitation probabilities for Thursday. While the Met Office indicates less than 5 percent chance, The Weather Network reports 100 percent with potentially 25 millimetres of rainfall possible. Users should check multiple sources before making weather-dependent plans.

Date High (°C) Low (°C) Conditions Precip Chance
Wed Apr 22 11 7 Cloudy with sunny breaks 40-90%
Thu Apr 23 14 8 Sunny intervals 5-100%
Fri Apr 24 17 11 Cloudy with showers 100%
Sat Apr 25 13 11 Cloudy 30%
Sun Apr 26 14 12 Cloudy with showers 60%
Mon Apr 27 16 9 Showers 90%
Tue Apr 28 13 9 Cloudy 30%

Precipitation and Wind Details

Friday is expected to bring the most significant rainfall of the period, with The Weather Network indicating possible accumulations of around 15 millimetres. Showers will continue through the weekend, though Saturday currently shows the lowest precipitation probability at 30 percent. Monday and Tuesday next week also carry shower risks, with Monday showing a 90 percent chance of rainfall estimated at 5-10 millimetres.

Wind conditions remain moderate throughout the week, generally between 5-11 miles per hour according to Met Office data. These speeds are typical for the coastal location and are unlikely to cause disruption to travel or outdoor activities. UV levels stay low to moderate, ranging from no risk during nighttime hours to moderate levels during peak afternoon temperatures.

14-Day Weather Outlook for Newcastle Co Down

Looking further ahead, the fourteen-day forecast from The Weather Network indicates an unsettled but mild pattern through early May. High temperatures will generally fall between 12°C and 17°C, while overnight lows range from 8°C to 12°C. This extended outlook shows frequent shower activity interspersed with drier periods.

Extended Forecast Note

Forecasts beyond seven days carry increased uncertainty. The Weather Network projects rainfall on several days, including 100 percent probability on April 23 and 24, dropping to 30 percent by April 29. Daily rainfall amounts vary from trace amounts to potentially 25 millimetres depending on the day.

Date High (°C) Low (°C) Precip Chance Rain Amount
Apr 23 (Thu) 14 11 100% ~25mm
Apr 24 (Fri) 17 11 100% ~15mm
Apr 25 (Sat) 13 11 30%
Apr 26 (Sun) 14 12 60% ~5mm
Apr 27 (Mon) 16 9 90% 5-10mm
Apr 28 (Tue) 13 9 30%
Apr 29 (Wed) 13 9 30%
Apr 30 (Thu) 13 11 30%
May 1 (Fri) 12 9 70% ~1mm
May 2 (Sat) 14 10 60% 2-4mm
May 3 (Sun) 13 10 30%
May 4 (Mon) 13 8 60% ~1mm
May 5 (Tue) 13 11 30%

The period from late April through early May shows variable conditions. Friday, May 2 currently shows a 60 percent chance of showers with 2-4 millimetres of rainfall possible. The first week of May appears to maintain the unsettled pattern, though with somewhat lower precipitation probabilities than the preceding days.

Hourly Weather Forecast Newcastle Co Down

The Met Office provides detailed hourly forecasts that allow residents to plan activities with precision. For Thursday, April 23, the pattern shows a clear night transitioning to partly sunny conditions through the morning and afternoon. Temperatures begin at 6-7°C during the early morning hours before warming steadily throughout the day.

AccuWeather’s hourly data aligns with this pattern, showing cooler overnight temperatures around 11-12°C (approximately 52-53°F) during the 2-3am period with dropping dew points. Morning conditions bring partly sunny skies with temperatures around 12°C feeling similar, with northwest winds of 15-16 miles per hour. Precipitation probability remains at zero percent with fair air quality according to AccuWeather.

Time Temperature (°C) Conditions UV Risk Wind (mph)
12am 7 Clear night No risk 9-11
3am 6 Clear night No risk 9
6am 6 Clear night No risk 7
9am 11 Sunny intervals Low 6
12pm 14 Sunny intervals Moderate 8
3pm 14 Sunny intervals Moderate 8
6pm 14 Sunny intervals Low 6
9pm 9 Clear night No risk 5

Wind speeds follow a predictable daily cycle, starting around 9-11 miles per hour overnight and dropping to around 5-6 miles per hour during the late morning and early afternoon. This pattern reflects typical sea breeze influences along the County Down coast. UV risk climbs to moderate levels between 10am and 3pm, then drops to low during the late afternoon and evening hours.

BBC Weather Newcastle Co Down

BBC Weather offers another valuable resource for tracking conditions in Newcastle, County Down. The service typically provides current conditions summaries including high and low temperatures, wind details, and forecast blocks that offer a quick overview of the day ahead. According to available data, BBC Weather has indicated light cloud conditions with an 11°C high for recent periods.

While direct BBC forecasts for Newcastle County Down appeared limited in the current search results, the BBC Weather service generally maintains comprehensive coverage for Northern Ireland locations. The service uses official meteorological data and presents it in a concise, factual manner suitable for quick reference. Users seeking BBC-specific forecasts for the area may find additional information through the BBC Weather for Newcastle page.

Met Office Weather Newcastle Co Down

The Met Office serves as the United Kingdom’s national weather service, providing the most precise UK-specific hourly and seven-day forecasts for Newcastle, County Down. Their data indicates dry conditions with clear periods and notes a potential ground frost risk in sheltered glens. For visitors planning to explore the Mourne Mountains or coastal paths, this information proves particularly valuable.

Ground Frost Risk

The Met Office has flagged ground frost risk in sheltered areas, particularly in mountain glens surrounding Newcastle. Anyone planning early morning activities should account for potentially icy surfaces in less exposed locations, especially during clear overnight periods.

For those interested in comparing weather patterns across different UK coastal locations, the Met Office Weather Bournemouth – Latest Forecast and Conditions page provides a useful reference point. Similarly, those following sports events in the area may find the Newcastle Match Live Today – TV, Scores and Kick-Off Guide helpful for planning around weather conditions.

AccuWeather provides additional forecasting perspectives, noting breezy conditions tomorrow with afternoon showers. The service focuses on breezy and rainy trends, using temperature readings that some users may find easier to interpret in Fahrenheit for quick reference. Their hourly forecasts align broadly with Met Office data, confirming the clear night transitioning to partly sunny conditions during morning hours.

Understanding Forecast Reliability

What the Data Confirms

Multiple sources agree on several key points: tomorrow will bring mild temperatures reaching the mid-teens Celsius, overnight conditions will remain clear, and winds will stay moderate without approaching disruptive levels. The overall trend shows a warming pattern compared to recent days, with Thursday representing the driest period in the near-term outlook.

Ground frost risk in sheltered locations is acknowledged by the Met Office, particularly for glens and areas away from the immediate coast. This reflects the typical temperature inversions that occur during clear nights in mountainous terrain. Coastal Newcastle itself benefits from the moderating influence of the Irish Sea, which prevents extreme temperature drops.

Areas of Uncertainty

Precipitation forecasts for Thursday show significant disagreement between sources. While the Met Office indicates less than 5 percent precipitation probability, The Weather Network projects 100 percent with potentially 25 millimetres of rainfall. This discrepancy likely reflects different model interpretations and timing differences in approaching weather systems.

Extended forecasts beyond seven days carry inherently higher uncertainty. Temperature predictions for mid-May show slightly cooler overnight lows (8-9°C) compared to the coming week, but these projections may shift as the actual date approaches. Users should treat the fourteen-day outlook as indicative rather than definitive.

Newcastle’s Coastal Weather Context

Newcastle, County Down occupies a distinctive position at the foot of the Mourne Mountains, where the coastline meets the Irish Sea. This geography creates microclimates that can differ substantially from surrounding areas. The mountains provide shelter from some weather systems while the sea moderates temperature extremes throughout the year.

Southeast winds are common in this area, particularly when weather systems approach from the Atlantic. These winds can bring moisture and milder temperatures, while northwest winds tend to bring clearer, cooler conditions from the Irish Sea. Understanding these patterns helps residents interpret forecasts more accurately for their specific location within the town.

Sources and Data Quality

The forecasts presented here draw from three primary sources: the Met Office as the UK’s official meteorological service, The Weather Network for extended outlooks, and AccuWeather for additional commercial perspectives. The Met Office offers the most precise UK-specific hourly and seven-day data for Newcastle, making it a primary reference for planning purposes.

Met Office: “Dry with clear periods, potential ground frost in sheltered areas.”

The Weather Network: “14-day forecast showing mild, unsettled conditions with frequent shower risks ranging from 30-100 percent.”

AccuWeather: “Breezy conditions with afternoon showers; low precipitation probability overnight.”

Summary

Newcastle, County Down can expect mild and predominantly dry conditions tomorrow, Thursday April 23, with temperatures climbing to 14°C during sunny intervals. The seven-day outlook shows a warming trend through Friday before returning to an unsettled pattern with regular shower activity through the following week. Extended forecasts indicate this mild but showery pattern continuing into early May. The Met Office provides the most detailed local data, though users should consult multiple sources for precipitation forecasts due to noted discrepancies in Thursday’s outlook.

Frequently Asked Questions

What is the weather forecast for Newcastle County Down over the next 14 days?

The fourteen-day outlook shows highs of 12-17°C with frequent shower risks (30-100%). Friday April 24 may reach 17°C, while overnight lows range from 8-12°C. Precipitation becomes more likely mid-week, with drier spells expected during the first week of May.

How accurate is the BBC Weather forecast for Newcastle Co Down?

BBC Weather uses official meteorological data and provides reliable current conditions and daily summaries. Extended forecasts beyond 5-7 days carry inherent uncertainty regardless of source, so checking updates regularly improves planning accuracy.

Where can I find hourly weather updates from the Met Office for Newcastle?

The Met Office website provides detailed hourly forecasts specifically for Newcastle, County Down, including temperature, wind speed, UV levels, and precipitation probability. Their data is updated regularly throughout the day.

What temperatures are expected tomorrow in Newcastle County Down?

Thursday, April 23 should see temperatures ranging from 6-7°C overnight to approximately 14°C during the afternoon peak. Evening temperatures around 8°C with clear skies are expected.

Are there any weather warnings currently in effect for Newcastle?

No active weather warnings have been indicated for Newcastle, County Down in the current data. The Met Office has noted ground frost risk in sheltered mountain glens during clear overnight periods, which users should consider for early morning activities.

What is the wind forecast for Newcastle this week?

Moderate winds of 5-11 miles per hour are expected throughout the week. These speeds are typical for the coastal location and are unlikely to cause travel disruption or significant outdoor activity impacts.

How do I compare weather forecasts from different sources?

Comparing forecasts requires noting the publication time, forecast range, and any confidence indicators. The Met Office, BBC Weather, and AccuWeather all provide valuable perspectives, though slight variations occur due to different prediction models and update frequencies.


Arthur William Thompson Cooper

About the author

Arthur William Thompson Cooper

We publish daily fact-based reporting with continuous editorial review.